Shining Arcanine wrote: They are talking about the ability of a website to hijack your monitor and create an interface that looks similiar or exactly the same as Windows's GUI.
That is an incorrect interpretation.
That is what it can be used for and what it is primarily used for.
If clicking a button could have that take over you screen, what keeps it from taking over your screen without your consent?
Absolutely nothing. If this was designed to hijack the screen and had a different interface, chances are malicious websites could get private information out of most Windows users, then Microsoft would be sued for allowing this to happen.
However, if you launch it with iexplore -k the old full-screen, no toolbar arrangement is still there. Since any legitimate use of it is almost certainly going to start it in this way I don't think it's an issue.
If that is the case then it's a solution to the whole problem. Those that really want to be able to run full screen may do so. Those that don't know about it or don't make a decision will have it disabled. No options removed.
The only thing that Microsoft is pulling is the ability of websites to hijack/take control of/<whatever you want to call it> the screen through a nonstandard method (that Microsoft shouldn't have made in the first place) without user consent. Everything else (ActiveX, manual ability to full screen IE, etc) stays the same.